Machine tool



A ril 1 1924. 1,488,654

a. D. SUNDSTRAND MACHINE TOOL Original Filed June' 11, 1919 11v VENTOR f 6. 3.5 3 GusZaf'D Sumisf'ram Kg $1M wax,

A TTORNE Yd V 37 Patented Apr. 1, 1924.

UNITED STATES PATENT OFFICE.

GUSTAF DAVID SUNDS'lB-AND, OF ROCKFORD, ILLINOIS, ASSIGNOR- TO ROCKFORD MILL- INGr MACHINE COMPANY, OF ROCKFORD, ILLINOIS, ACORPORATION OF ILLINOIS.

MACHINE TOOL.

7 Application filed .Tune 11, 1919, Serial No. 303,429. Renewed October 22, 1923.

To all 10 7mm it may concern Be it known that I, GUSTAF DAVID SUND- STRAND, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Machine Tools, of which the following is a specification.

My invention relates more specifically to an improved I overarm and arbor-support especially adapted for use in connection with machines of the type disclosed in my copending application No. 29 1511, filed May 3, 1919.

One of the objects of the invention is to provide simple and improved means for swinging the arbor-support to one side to allow the tool to be removed from the arbor.

j A special object is to provide for perfect alinement and-rigid support of the arbor by operative engagement with the faces of the overarm when the tool is making a cut.

Further objects and advantages of my invention will become apparent as the description proceeds.

In the accompanying drawings Figure 1 is a side view of a milling machine illustrating the application of my improved arborsupport thereto, Fig. 2 is an end view of the overarm and arbor-support, and Figs. 3 and 1 are sections on the line el4= of Fig. 2 showing two alternative methods of mounting the retaining pin. Figs. 5 and 6 are a plan and side view respectively of a modified form of overarm.

In the embodiment of my invention selected for illustration, 10 indicates a column of a millingmachine supported by a suitable base 11 andcarrying a slidable knee 12. A

An arbor 15 projects from the column 10 above the work-table 14 and carries a cutting tool 16 suitably spaced on the arbor 15 by rings 17 and clamped in position by tightening the nut 18. As the above mentioned parts in the relationship described are all old in the art and form no part ofmy present'invention, further detailed description thereof is deemed unnecessary.

A rectangular overarm 19 is mounted in a U-shaped slot in the upper end of the column 10. A cap 20 extends across the slot over the overarm and carries suitable looking screws 21 adapted to clamp the overarm rigidly in position. At its outer end the slide 13 on the knee carries a work-table 14.

overarm carries the arbor-support indicated in its entirety by the reference numeral 22, and comprising a U-shaped casting 23 having anintegral downward projection 24: terminating in a bearing 25 adapted to receive the rings 17 and thus support the projecting end of the arbor 15. A cap 26 extends across the top of the U-shaped casting 23 and may be tightened into clamping engagement with the upper surface of the overarm 19 by suitable means such as clamping screws 27.

Means for swinging the arbor-support 22 to one side to permit convenient removal of the tool 16 are provided, comprising an ex tension 28 of the overarm 19 pivotally mounted on a central bolt 29 and carrying a suitable locking pin 30 resiliently urged into a conical depression in the overarm 19 when the extension 28 is 111 alinement wlth the overarm. To swing the arbor-support to one side clear of the path of thetool it is necessary to loosen the clamping screws 27 and slide the arbor-support along the overarm onto the pivoted extension 28. Only slight force is necessary to spring the resiliently held locking pin 30 out of its pocket and rotate the arbor-support to the position shown at dotted lines in Fig. 2.

\Vhen the arborsupport is to be replaced and pin 30 is brought into approximate alinement with its seat, it will resiliently hold the extension 28 in exact alinement, making it easy for the workman to slide the bearing 25 over the end of the arbor 15.

As shown in Fig. 3 the locking pin 30 may be seated in a blind hole in the pivoted extension 28 into which the spring 31 is dropped before the insertion of the pin; or, as shown in Fig.4, the hole may be drilled clear through and a plug 32 threaded into the outer end to hold the spring in place.

Referring'to Figs. 5 and 6, the overarm 33 carries a section 34: corresponding to the section 28 in Figure 1, pivoted for rotation around a vertical axis on a pintle 35 and supported in its rotation by engagement with said pintle and also by the engagement of the faces of the projection 36 at the end of the overarm with the inner faces of the arms 37 on the pivoted section, which define the U-shaped slot receiving said projection. \Vhile suitable locking means for retaining the projection 34 in alined position may obviously be provided, I prefer to omit such means, as the pivoted section will remain in any position in which it is placed, being pivoted on a vertical axis.

It will be seen that I have provided a very simple and serviceable means for quickly swinging the arbor-support out of the way of the tool and for rep-lacing the arborsupport in operative position. When in operative position, the arbor-support is rigidly held by engagement between the faces of the main section of the overarm and parts integral with the bearing supporting the arbor.

While I have described in detail the specific embodiment of my invention at present preferred, it should be understood that the description is only for purposes of illustration and that many modifications andimprovements will naturally occur to a person skilled in the art. I aim in the subjoined claims to cover all such legitimate modifications and improvements.

I claim as my invention:

1. In a machine tool, in combination, an angular arm, an arbor-support slidably mounted on said arm, and an extension at the end of said arm mounted for rotation around an axis parallel to said arm, said arbor-support being adapted to slide onto and be supported by said rotatable exten sion.

2. The combination recited in claim 1, in combination with a pin having a conical point and adapted to be carried over the face of said arm by the rotation of said extension, said face having a conical depression adapted to receive the point of said pin when said extension is in alinement with said arm, and a spring adapted to press said pin against said arm.

3. In a machine tool, in combination, an arm, a, pivotally mounted extension carried by said arm and a slidable arbor-support adapted to be supported by said arm or by said pivotally mounted extension.

i. In a machine tool, in combination, an arbor-support, means for immovably and rigidly holding said arbor-support in operative position, and means having surface engagement with said arbor-support for movably supporting the latter in a position slightly removed from its operative position.

5. In a machine tool, in combination, an arm, a pivotally mounted extension carried by said arm, a slidable arbor-support adapted to besupported by said arm or by said pivotally mounted extension, said extension being rotatable into and out of'alinement with said arm, and resilient means tending to hold said extension in alinement with said arm.

6. In a machine tool, in combination, an arm, a pivotally mounted extension carried by said arm, a slidable arbor-support adapted to be supported by said arm or by said pivotally mounted extension, said extension being rotatable into and out of alinement with said arm, and resilient means tending to hold said extension in alinement with said arm, said resilient means being rendered inoperative by displacement of said extension out of alinement beyond a predetermined amount; 7

7. In a machine tool, in combination, an arbor, an arbor-support, means for rigidly and immovably supporting said arbor support in operative position, means operative to release said first named means and permit said arbor-support to slide in a direction parallel to the axis of said arbor, and pivoted means receiving and supporting said arbor-support upon sliding motion of the latter through a predetermined distance.

8. In a milling machine, in combination, a non-circular arm, an arbor-support slidably mounted on said arm, and an extension at the end of said arm mounted for pivotal movement, the outer surfaces of said extension being flush with the outer surfaces of said arm, said arbor-support being adapted to slide onto and be supported by said pivoted extension.

9. In a machine tool, in combination, an arbor, an arm of angular cross section, an arbor-support in normal operative position providing a bearing for said arbor and comprising a portion integral with said bearing adapted to engage the faces of said arm, and means pivoted about an axis coincident with the axis of said arm for sup-- porting said arbor support in inoperative position.

10. In a machine tool, in combination, an arbor, an arbor support, a plurality of members for supporting said arbor support, and means for supporting said arbor support on any one of said members, said arbor support and one of said members being pivotally movable to carry the arbor support out of alinement with said arbor when said arbor support is supported solely by said member.

In testimony whereof, I have hereunto set my hand.

GUSTAF DAVID SUNDSTRAND. 

